关于tableView分割线置顶

-(void)tableView:(UITableView *)tableView willDisplayCell:(UITableViewCell *)cell forRowAtIndexPath:(NSIndexPath *)indexPath {

    if([cell respondsToSelector:@selector(setSeparatorInset:)]){

        [cell setSeparatorInset:UIEdgeInsetsZero];

    }

    if([cell respondsToSelector:@selector(setPreservesSuperviewLayoutMargins:)]){

        [cell setPreservesSuperviewLayoutMargins:NO];

    }

    if([cell respondsToSelector:@selector(setLayoutMargins:)]){

        [cell setLayoutMargins:UIEdgeInsetsZero];

    }

}